light-hearted vs lighthearted

light-hearted and lighthearted both are adjectives.

Word	Noun	Adjective	Verb	Adverb
light-hearted	No	Yes	No	No
lighthearted	No	Yes	No	No

As adjectives, light-hearted and lighthearted are synonyms defined as:

Other synonyms of light-hearted include blithe, blithesome, lightsome.

light-hearted (adjective)	lighthearted (adjective)
carefree and happy and lighthearted	carefree and happy and lighthearted